[n] W. A. van Kampen and J. Liedorp, “A Fast Beam Quality Measuring Device”, in Proc. PAC'71, Chicago, IL, USA, Mar. 1971, pp. 923-926.
%\cite{van Kampen:PAC71} \bibitem{van Kampen:PAC71} W. A. van Kampen and J. Liedorp, \textquotedblleft{A Fast Beam Quality Measuring Device}\textquotedblright, in \emph{Proc. PAC’71}, Chicago, IL, USA, Mar. 1971, pp. 923--926.
@inproceedings{van kampen:pac71, author = {W. A. van Kampen and J. Liedorp}, title = {{A Fast Beam Quality Measuring Device}}, booktitle = {Proc. PAC'71}, pages = {923--926}, paper = {}, venue = {Chicago, IL, USA}, series = {Particle Accelerator Conference}, number = {4}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {6}, year = {1971}, language = {english} }